3WVT:
reference: Structural insight into equine lentivirus receptor 1., Qian L, Han X, Liu X, Protein Sci. 2015 May;24(5):633-42. doi: 10.1002/pro.2634. Epub 2015 Jan 28. PMID: 25559821

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).